Mirror Lake Road over Mirror Lake Overcrossing
FairAnchorage Municipality, Alaska · Mile Point 0.1 · Structure no. 1368
- Built
- 1977
- 48 years old
- Condition
- Fair
- inspected July 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 184 ft
- 2 main spans
- Daily traffic
- 720
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
Mirror Lake Road over Mirror Lake Overcrossing is a prestressed concrete tee beam carrying Mirror Lake Road over Mirror Lake Overcrossing in Anchorage Municipality, Alaska. It was built in 1977, so it is 48 years old, older than the Alaska average of 35.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 720 vehicles a day, roughly 17% of them trucks, projected to reach 830 by 2039. The structure is 184 ft (56.1 m) long and 43 ft wide. If it were closed, the detour would be 5 mi (8 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mirror Lake Road over Mirror Lake Overcrossing built?
It was built in 1977, making it 48 years old in 2025.
What condition is Mirror Lake Road over Mirror Lake Overcrossing in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.
How much traffic does Mirror Lake Road over Mirror Lake Overcrossing carry?
About 720 vehicles per day (2020 count), of which roughly 17% are trucks.
How long is Mirror Lake Road over Mirror Lake Overcrossing?
The structure is 184 ft (56.1 m) long with a longest span of 92 ft (28 m) and a deck 43 ft wide.
Who owns Mirror Lake Road over Mirror Lake Overcrossing?
It is owned by the State Highway Agency.